Boot and shoe sewing machine.



E. SMITH.

BOOT AND.SHOE SEWING MACHINE.

APPLICATION FILED OCT. I?. I9I0.

Patented Mar. 14, 1916..

I SHEETS--SHEET I- D IQY; a@ Ma INVENTOR Zagmf $772155 W N ESSES ATTORNEY E. SMITH.

BOOT AND SHOE SEWING MACHINE.

APnLlcATloN FILED ocT.11. |910.

7 SHEETS-SHEET 2.

l, 175,877.. Patented Mar. 14,1916.

INVENTOR ATTORNEY E. SMITH.

BOOT AND SHOE SEWING MACHINE.

APPLxcATxoN 111.50 ocT.17. 1910.

1,175,877. Patented 111711111916.

7 SHEETS-SHEET 3.

INVENTOR W W ATTORNEY WITN ESSES E. SIVIITH. Boo AND sHoE SEWING MACHINE.

`APPLICATION FILED OCT. I7. 1910.

Patented Mar. 14, 1916.

7 SHEETS-SHEET 4.

WITN ESSES ATTORNEY 'ma coLUMuM Puxlgomuwn co., wAsHlNu'roN, D. c.

E. SNHTH.

BOOT AND SHOE SEWING MACHINE. APPLICATION FILED ocT.17. 1910.

Patented Mar. 14,1916.

7 SHEETS-SHEET 5.

WITNEssEs INvENoR WIM @wif ATTORN EY E. SMITH.

BOOT AND SHOE SEWING MACHINE.

APPLICATION FILED oc?. I7, 1910.

l, 175,877. Patented Mar. 14, 1916.

7 SHEETS-SHEET 6.

WITNESSES l INVENTOR ATTORNEY E. SMITH.

BDOT AND SHOE SEWING MACHINE.

APPLICATION men 001.11, 1910.

1,175,877. Pmnd Mar. 11,1916.

7 SHEETS-SHEET 7.

WITNESSES INVENTOR Mw/za MM5/f 'Eg/gm@ ffa WW' Ww n ATTORNEY WFE STA PATENT @F iitlld.

EUGENE SMITH, GF PILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO BRIDGET CON/VAY HO'WARD, 0F PHILADEE-IIA, PENNSYLVANIA.

BOOT AND SHOE SENING MACHINE.

Application filed October 17, 1910.

To all whom it may conc-ern Be it lznown that l, EUGENE SMrTH, a citi- Zen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful improvement in Boot and Shoe Sewing Machines, of which the following is specification.

My invention relates to a new and useful improvement in boot and shoe sewing machines, and has for its object to so construct a machine of this description as to so hold the worlr as to provide 'for the 'formation ot a stitch closer to the top of a shoe than has heretofore been possible and to produce a loch stitch.

A 'further object of my invention is to provide for positively holding the work, feeding it a predetermined distance lengthwise, locking said work in the position to which it has previously been fed, taking a fresh hold upon the work prior to the insertion of the awl of the formation of the stitch.

A still further object ot my invention is to provide for a positive hold on the thread, baclr of the taire-up, at predetermined times, so that when the thread is drawn by the take-up, the slack formed therein by its passage around the shuttle, will be entirely talren up and the thread drawn tight.

Y*With these ends in View, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

ln order that those skilled in the art to which this invention appertains may understand how to malte and use the same, ll will describe its construction in detail, referring by letter to the accompanying drawing forming a part of this speciiication, in which- Figure 1 is a side elevation of the machine, showing the feed dog in the position which it assumes, when locking the work just prior to feeding. Fig. 2, is an elevation talren from the opposite side of the machine. Fig. 8, a front elevation. Fig. el, a plan view. Fig. 5, a detail perspective of the feed mechanism, take up, shuttle and cam mechanism for operating the same. Fig. 6, a detail side elevation oi" the locking dog, and the cam mechanism for operating the Specification of Letters Patent.

Patented Mar. le, i916.

serial no. 587,554.

same. Fig. 7, a front elevation thereof. Fig. 8, a detail side elevation of the thread carrier, and the operating mechanism therefor. Fig. 9, a front view of the same. Fig. 10, a diagram of the needle and awl, shouing their relative position and shape. Fig. 11 a detail perspective of one form of work rest. Fig. 12, a similar view of a slightly modiiied form of worlr rest. Fig. 13, a sectional perspective oi the wax pot and pump. Fig. 14C, a section at the line X-X of Fig. 13. Fig. 15, is a section at the line X-X of Fig. 3, showing the hollow spindle, awl and needle carrier, and pinion for operating the same. y

ln carrying out my invention as here einbodied, 1 represents the frame of the machine, which may be ot any suitable design, to support the various operating parts. Journaled in this trame is a short hollow spindle 2, to which is secured the awl and needle carrier 3, while to the opposite end of this hollow spindle is secured the pinion t, which meshes with the segmental gear 5, by which the pinion is oscillated first in one direction and then the other for the purpose hereinafter set forth.

6 represents the awl which is detachably secured to the carrier 3 and this awl is so curved as to form a part of a circle, the center of which is the center of rotation of the carrier. To the opposite side of the carrier is also detachably secured the needle 7, which is likewise so curved as to form a part of the same circle as that of the awl, the hook end of this needle is or' the shape shown in Fig. 10, which will cause the thread when engaged therewith to be drawn on the line coinciding with the hole formed by the awl.

8 represents the work rest, which when oi the construction shown in Fig. 11, is utilized for stitching the sole to the welt, and when of the construction shown in Fig. 12 is utilized for seaming or stitching the welt on to the upperv and insole, and this rest has formed therewith, a dovetail shank 9, adapted to fit on a corresponding dovetail groove formed with the Vframe and be held in place by the screws 10. ln the rest is Jformed an elongated slot 11 for the passa ge of the needle and awl and to facilitate the feeding of the work as hereafter set forth.

12 is a cam shaft pivoted in suitable bearings upon the frame and upon this-shaft is secured the cam disk 13 in which is formed the cam groove 14. j

The lever 15 is pivoted at 16 and carries the stud 17 which projects in the cam groove- Vin the bracket 2O and on this sliding shaft is secured the feed dog lever 21, the upper end of which is adjustablyattached to the connecting rod 22, by being pivoted upon the pin 22a set in the block 22b fitted to slide in the slot formed in said connecting rod and the position of this block is regulated by the screw 22C. rlhe feed dog lever is adapted to slide upon the pin 22a in order that it may follow the movements of the shaft 19 to which it is secured. The object of this adjustment is to determine the depth to which the feed dog penetrates the work and to ,provide for handling various thicknesses of work. v

The connecting rodV 22 is pivoted to the cam lever 23, the latter being pivoted to the frame at 24 and is provided with a stud 25 which projects in the cam groove 26 formed in the cam disk 13V on the opposite v side of the cam groove 14, and this cam groove is of such contour as to properly time the oscillating movements of the feed f dog lever.

The feed dogvlever has formed therewith or secured thereon the feed dog 27 which is in the shape of a pointed prong adapted to penetrate the wo-rk to a considerable depth and if necessary pass entirely through the same, thus taking a iirm andV positive hold thereon in order that the work may not slip or be displaced when being fed step by step for determining the length of the stitches.

In order that the feed dog may be given a sidewise movement in addition to the oscillating movement just described, the block 28 is set upon the outer end of the sliding shaft 19 between the two collars`29, and this block has projecting therefrom the pins 30 adapted to engage the slots in the forked end of the stitch regulating lever 31, and this lever has an elongated slot 32 formed therein through which the set bolt 33passes, the lower end of which is held in a groove in the frame, the upper end being'` provided with the thumb nut 34. By adjusting this thumb nut lengthwise yof the slot 32 it is obvious that the throw of the outer end of the lever will be varied as the stud forms the fulcrum of said lever.

35 is a4 bracket projecting upward from the frame having a slot formed in its o-verhanging end, and in'this slot projects the upper end ofthe pin 36, set -in the rear end of the stitch regulating lever 31, while the lower end of this pin projects in thecam groove 37,` formed in the cam disk 38, said disk being secured upon the power shaft 12. By this arrangement the feed regulating lever will be held against displacement when the bolt 33 is being adjusted to vary thef length of the stitch and at the same time the heel end of this lever will be Vfree to.V

oscillate sidewise from the actie-n of its camY groove. o Y

By this arrangement of cams and levers the feed dog will be caused to pierce the work, feed it sidewise, release said work,

move in the opposite direction and take a` fresh hold thereon. .During these operations of the feed dog it is essential `that the i work be alternately held by the secondary mechanism and this isaccomplished by the presser foot 39, which is attached v'to and' formed with the lever 40 pivoted upon the hollow spindle 2 and consequently concentrically with the awlV and needle carrier.

The upper end of the lever 40 is slotted at 41, by which slot it is pivoted to the innerV work by the feed dog, and just prior to theV disengagement of the feed-V dog fro-m the Vwork the presser foot Vagain enters into en- Y gagement therewith, holding it in this position until the feed dog is moved backward and again Aengages the work.

In order that the work may be released when desired, a handle 46 projects upward from the cam lever 42 and by drawing forj ward Vupon this handle against the action of the spring 45 the presser dog will be n swung outward.

47 represents the take up lever whichris pivoted to the frame 48 and has a stud 49 shown in dotted lines in Fig. 2, whichstud stitch, l provide a clamp 53 which is pivotedV at 54 and is attached to and closed against the stationary jaw 55, between which the thread passes and thus clamp the thread at a predeterminedtime, and the action of this lclamp is broughton by the roll 56 traveling upon the periphery upon the cam disk 58, which is so formed as to permit the release of the thread at the proper time when it is being drawn forward by the needle and again clamp the same when the take up is taking un the slack. The thread when leaving the clamp may pass over or around any suitable tension disk, and through any suit able guides and finally pass through a loop in the tension spring 59 and down through an eye in the looper GO, which latter is secured to the bar 61 whicn is operated by the cam lever 62 and the roll 68, which travels upon the periphery of the cam disk 13, the latter having a suitable cam surface 64C thereon for actuating this cam lever and giving the bar a to and fro sliding movement and consequently carrying the thread which is passed through the eye into and out of the path of the needle.

65 represents the shuttle holder which consists of two spring rings, s cured to the base 6G, which latter is adjustably held upon the bracket 67 by the set screw V68. The shuttle 69 is set between these spring rings the edges of the latter being cut away so as to make reduced bearing surfaces as indicated at 95 and thus reduce the friction.

in order tha the thread from the needle may be looped around the shuttle, I provide the hook 70 which is carried by the disk 71 secured upon the shaft 7 2, upon the opposite end of which is secured the pinion 7 3, 1neshing with the rack 74.

The rack 7 4 is carried by the outer end of the cani lever 75, which is pivoted at 7 6 and is irovided with a stud 77, which projects into the cam groove 78 formed in the cam disk 38,the stud and cam groove being shown in dotted lines in Fig. 2, thus the looper will be caused to oscillate in proper time to draw the thread from the needle and loop it around the shuttle.

In sewing machines it is very essential to apply wax to the thread prior to its being used for the formation of the stitches, and heretofore this has been usually accomplished by drawing the thread through a wax pot, back to the machine, the result being that when the machine is stopped temporarily the wax would be chilled, and before the machine could again be used it was necessary to draw off the previously waxed thread, but I overcome this objection by providing a water jacket wax pot 79, which may be held over the gas burner 80 in any suitable manner, and within this pot is secured the pump barrel 81, the lower end of which is threaded through the bottom of the inner casing of the wax pot and into the outer casing as clearly shown in Fig. 15, and in this pump barrel is fitted the plunger 82.

83 is a cam lever in the outer end of which is swiveled the adjusting screw 841- which latter is threaded into the plunger 82, so

that manipulating this screw the actual position of the plunger within the pump barrel will be adjusted.

Holes 85 are formed through the pump barrel on a level with the bottom of the inner casing of the wax pot, so that when the plunger is moved upward, a certain amount of wax will be drawn from the pot in said barrel and when the plunger is moved downward it will i'irst eject the surplus wax from the barrel until its lower edge passes the holes 85 after which it will force the wax through the tube 86; the under side of the plunger being hollowed to facilitate its action.

rEhe wax tube 86 leads to a point just back of the work rest and has groove 87 formed in its inner end in alinernent with the travel of the needle and awl, and as the wax is forced through this tube it will issue into this groove through which the thread is drawn and consequently the wax will be applied to the thread at the proper point, namely, at the work.

rlhe cam lever 83 which operates the plunger and the wax pot is pivoted at 90 and carries the roll 89, which rides upon the periphery of the cam disk 38, the contour of which is such as to operate this lever at predetermined times for feeding the wax at the proper time.

Power may be applied to the machine in any suitable manner, such as by a belt wheel 88, secured to the shaft 12.

.From the foregoing description it is obvious that as the awl and needle are both upon the same carrier and curve to the same circle, the needle must always follow in the hole made by the awl, and thus relieve it of any strain in piercing the work. rihe feed dog being in the shape of a prong, will penetrate the work to such an extent that when the awl strikes the same hole less resistance will be offered said awl, and the sidewise movements of the feed dog are so timed that the indenture made thereby will be brought into alinement with the movement of the awl, thus distributing the work of piercing the leather so that any thickness of leather may be sewed without undue strain upon the feed dog or the needle.

0f course l do not wish to be limited to the exact details of construction here shown, as these may be varied within wide limits without departing from the spirit of my invention.

As shown in F ig. 10 the end of the needle is beveled at a so as to bring its point flush with its outside circumference to facilitate stitching close to the body of the shoe, and the awl is likewise beveled as indicated at for the same purpose.

Having thus fully described my inven tion, what I claim as new and useful, is

1. in a shoe sewing machine, the combination of a suitable frame, a carrier, means for oscillating said carrier first in one direction and then in the other, an awl attached 'to the carrier, said awl curved so as to form Aa part of a circle, the center of which is the center of rotation of the carrier, a needle curved in the saine manner as the awl and also attached to the carrier, ya work rest saving an opening therein, a presser foot adapted to clamp the work against said rest, and release the saine at predetermined times, a feed dog adapted to penetrate thewvor-k and feed it sidewise step by step when the presser foot is withdrawn from said work, means for bringing about this movement, and a circular shuttle for Ycarrying the bobbin, as specified. Y

2. In a machine of the character described, a combined awl and needle carrier, a spindle upon which said carrier is secured, a pinionsecured upon the opposite end of said spindle, a segmental gear meshin@` with the pinion for oscillating the same first in one direction for driving the awl through the work and then the other for passing the needle through the hole thus formed by said awl, a cam mechanism actuating the segmental gear, a curvedawl secured toone end of the carrier, a curved needle secured to the opposite end of the carrier, the line of the curve of said awl and needle being in the same circle and plane, a work rest having an opening therein, a feed dog lever, a sliding shaft, towhich said lever is secured, said shaft being journaled in the spindle to which the awl and needle carrier is secured, means for sliding said yshaft'and consequently the feed dog Ylever longitudinally, means for swinging said feed dog` lever, and a prong shapedfeed dog attached tothe lever and adapted to'pene- 'trate the work so as to assist the awl in forming a hole through said work for the passage of the needle, as specified.

3. In a machine of the character described, a needle carrier, a spindle upon which said carrier Vis secured, meansv for oscillating the same first in one direction and then the other, a curved awl secured to one end of the carrier, a curved needle se-y cured to the opposite end of the carrier, a work rest having an elongated opening therein, a presser foot Vmeans for oscillating vthe same, a feed dog lever, a sliding shaft te which said lever is secured, said shaft being journaled concentrically with the awl and needle and in the spindle of the carrier of said awl and needle, mea-ns for sliding the shaft and consequently the feed dog lever longitudinally, means for swinging said feed dog lever, a prong shaped feed dog attached to the lever and adapted to penetrate the work so as to assist the awl in forminga hole through said work for the f passage of the thread, a thread carrier having an eye therethrough for the passage of the thread, and means forV moving said carrier to and away from the path of the needle whereby the hooked end of the needle will be caused to engage said thread, as specified.

a. In a shoe sewing machine, the combination of a feed dog adapted to form a preY liminary opening. in the work forran awl, a presser foot and an awl and needle, with mechanisms for operating said elements, said mechanisms being so timed as to put the presser foot in contact with the work while the feed dog is out of contact there with and the awl and needle are operating on said work, and to take the presser foot out of contact with the work wnile the vfeed dog is in contact therewith, as and for varranged to engage the work before ,the presser foot is disengaged therefrom'to advancev the work and Vform an indent in the work for the awl.v

7. In adevice of the character stated the combination of a work rest, an awl, aneedle, a presser foot arranged to engage the work atV predetermined intervals, and a prong shaped feed dog adapted to penetra-te the work at predetermined intervals and at predetermined distances, whereby a preliminary opening is formed in the work for the awl to decrease the resistance to said awl.

8. In a. device of the character stated the combination of a work rest, an awl, a needle,

a presser foot arranged to engage the work,

at predetermined intervals, a prong shaped feed dog adapted to penetrate the work to Vform a preliminary opening for the awl,

means'for causing said feed dog to engage the'work at predetermined intervals, and means for advancing the work a predetermined distance to cause the awl to enter the preliminary opening made by the feed dog. In testimony whereof, I have hereunto affixed my signature in the presence of two subscribing witnesses.

EUGENE SMITH.

Vitnesses:

EDw. W. ANsTIcn, M.V E. Yos'r.

k'Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

